以葡萄糖为碳源的荧光碳点构建 Hg 2＋的检测方法
On Novel Fluorescent Method for Detections of Hg2+ Based on Carbon Dots
-
摘要: 首次以葡萄糖为碳源制得一种新型碳点，其具有较高的荧光强度．在此碳点中加入 Hg2＋后，碳点荧光强度显著降低，同时对其他金属离子无响应．为使Hg2＋对碳点荧光的猝灭作用效果最佳，对检测过程的各个条件进行优化，在优化的最佳条件下，Hg2＋与碳点荧光强度的变化呈良好的线性关系：ΔF＝919.04＋130.41 log CQ ，线性回归相关系数 R2＝0.9888，检出限为1.010-7 mol/L ．基于新型碳点成功建立了一种快速、有效检测 Hg2＋的新方法．Abstract: Glucose ,as carbon source ,has first been successfully employed to synthesize carbon dots ,w hich implies high fluorescence .Subsequently ,the introduction of mercury ions rather than other metal ions ob-viously leads to the fluorescence quenching of carbon dots .To further explore the optimized conditions to-wards determining mercury ions ,kinds of experiments have been performed .Under the optimized condi-tions ,the relative fluorescence intensity of carbon dots and the concentration of mercury ions show a satis-factory linear relationship :F=919 .04+130 .41log CQ ,with a correlation coefficient (R2 ) of 0 .9888 and a detection limit of 1 .0 10-7 mol/L ,suggesting the practicability of this proposed method .Finally ,a fast , novel method for assaying mercury ions has been well established in this study .
-
-
计量
- 文章访问数: 999
- HTML全文浏览数: 829
- PDF下载数: 1
- 施引文献: 0
下载: